Internal-combustion engine of the sleeve-valve type



E ,El 1,6m

Dec. 14 1926 H R. RICARDO INTERNAL c'oMBUsTlON ENGINE 0E THE SLEEVEVALVE TYPE Filed D S'G. 51, 1924 7/ fir/lilla AEB Y "tiren enr oesteHARRY .ELAPHiRICABBQ, @E LQFNDON, ENGLANB.

Hersenen-conmemora" 'mieren or 'ons -enti:non-e'nrhn irren.

Application tiled December 8l, 1924., Serial No. '559.175, and ini-GreatBritain Febmiary 2S. 192e.

The present invention reletesto internal combustion en'nes havingevslngle sleeve vulve, to Whiclfi and oscillating motion is imparted tocontrol the inlet and exhaust ports.

The invention consists in an internalcombnstion engine comprising incombination n cylinder Vhaving inlet and exhaust ports through the Wallsthereof, a piston, e single ported sleeve valve and means 'forreciprocating and oscillating said valve, that por-` ed with inlet:ports, B, and exhaust por-ts, C,

formed in' inthe valve sleeve, D, operating within the bore of thecylinder. This sleeve has n combined reciprocating and oscillolf ing:motion imparted to it by any suitable mechanism und is provided withinlet and exhaust ports, 'll and F, respectively adapted to 'coact withthe ports, B and C, oi the cylinder. The cylinder heed, G, upon whichpecking ring, H, may be provided, isl

secured to the cylinder, A, end projects within the sleeve, D, in whichthe piston, l, reciprocntes. The head, K, of the piston, I lying abovethe rings, J, extends so as to cover the portion of the sleeve whichlies .over the cylinder iorts, B amlC, the rings,

J, themselves being arranged as shown so that they lie it all timesbelow the edge of the sleeve ports.

Any coiivenient means muy be employed .tor imparting to the sleeve acombined ose combined reoiprooaitingv cillatory and reciprocetorymovement but in the particulerfexemple illustrated a, lay shaft, L,driven from the crank-shaft bye chain, M, in turn drives thesleeve-operating shaft, N, through. spiral gearing, 0,01. On the shaft,N, is e crsnkpin, P, gournalled in the s herical bearing member, Q,carried bythe s eeve. D, the member, Q, being free tov slide on the pin,P. .By appropriate choice of the velocity ratios of the different parts'of the drive, this rotation of the pin, P, im

parte" to the sleeve, D, a combined reclpro'cating 3nd oscillatingmotion at half engine spee i q Due to the present invention, thefollowin advantages are simultaneously secured (all only a, singlesleeve valve is required'; o) the sleeve is almost wholly shielded bothstontial paz-tof the combustion periodandthat portion of the Workingstroke during which the gases are'othigh temperature and 'high density;and (c) the piston rings are at elltirnes clear of the sleeve. valveports.

being substantially shielded by said piston et that period of the cycledilring which conditions of high temperature exist Within said cylinder,as set forth. A 'I y In testimony whereofVV I have signed mv name tothis specification. o l

.HARRY RALPH RICARDO.

60 V.from direct-contact With the hot working Huid and from radiatedheat during a sub-..

